MacDon 873 Combine Adapter - Manual (Page 14)

Form # 147069 Issue 09/06 12
5/16”
(5mm – 10mm)
PAN CLEARANCE TO CUTTERBAR
972/973/974 HEADER
NOTE: A 5-10mm gap at (A) is equivalent to a
15-20mm gap at (B).
11/16”
(15mm – 20mm)
A
B
HEADER ATTACHING & DETACHING
ATTACHING HEADER TO COMBINE AND ADAPTER (continued)
NOTE: Steps 17 to 19 are for 972, 973 and 974 Headers. For 963 Header, go to Step 20.
17. Fore aft positioning of the feed pan is critical.
Pan must be far enough forward to securely
engage the cutterbar, but not so far forward to
cause jamming, which prevents proper
function of the float system and causes header
vibration. Adjust feed pan engagement as
follows:
• 972 & 973 Headers: Extend top link to
maximum length and raise header about 6” (150
mm) off ground. Ensure adapter is resting on
float down stops and adjust front of pan to
provide a 5/16” (5-10 mm) gap at cutterbar. See
NOTE at right.
• 974 Header: Extend top link to maximum length
and set header to maximum “smile” position by
lowering onto 5” (125 mm) blocks at each end.
Ensure adapter is resting on float down stops
and adjust front of pan to provide a 5/16” (5-
10mm) gap at cutterbar. See NOTE at right.
18. Return top link to mid-range operating length of
19-1/4” (490 mm).
19. Disengage lift cylinder stop and lower header to
ground.
NOTE: Steps 20 & 21 are for 963 Headers only:
20. Ensure transition plate (C) fully engages adapter
support anchors (D) on cutterbar.
NOTE: For all combines slide transition plate
fully rearward in feed pan slots when adapter leg
pin is located in hole A (page 39). Slide
transition plate fully forward in feed pan slots
when adapter leg pin is located in hole B (page 39).
(See illustrations below).
21. Adjust transition plate location as follows:
a. Raise the header. Stop engine and remove key. Ensure that adapter float arm is on the down stop.
DANGER: To avoid bodily injury from fall of raised header, engage header lift cylinder
stops when working on or around raised header. See your Combine Operator's Manual for
details.
b. Loosen six nuts (E).
c. Slide transition plate into position for your specific combine make and model (as shown below).
d. Tighten six nuts (E).
963/873 TRANSITION PLATE LOCATION
(When adapter leg pin in hole A – refer to page 39)
E
963/873 TRANSITION PLATE
(When adapter leg pin in hole B – refer to page 39)
E
C
D
963 TRANSITION PLATE ENGAGEMENT